The application of pipeline end manifold (PLEM) in subsea field has been increased dramatically because of its economical and convenient factors as a subsea facility, however, implementing it into the deep waters is still quite challenging. Reference software tools relating to this project should be developed to provide some theoretical technique support for the engineers. Throughout this paper, the installation of PLEM, which is welded to the lower flexible pipe and tractived by the wire rounding through the suction pile, is studied in the 3D space. The mathematical model and its dedicated algorithm of the installation system is established, and the iterative procedures to calculate the mechanical behavior of the pipeline and the tractive wire in the installation project are illustrated. The initial configuration of the system can be obtained based on the catenary theory, and its final form, when subjected to environmental loads, can be acquired through the overall iterations by satisfying the compatibility and equilibrium requirements. Results derived from the proposed method are confirmed to be accurate and reliable when compared with the ones achieved from the OrcaFlex simulation.

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